STM32 Industrial Sensor Hardware Design
INR 37500–75000
About the project
I need a robust hardware platform built around an STM32 MCU that can sit inside a power-plant environment, pull data from existing equipment over RS-232 and RS-485, and forward it through a Quectel EC200 LTE module using an eSIM. The board must work off mains power yet seamlessly fall back to an internal battery when the line drops, so the power-supply stage needs both an AC/DC front end and a battery-charging circuit with automatic switchover. Core requirements • Schematic and routed PCB (Altium, KiCad or similar) incorporating STM32 + EC200 + eSIM socket • Galvanically-isolated RS-232 and RS-485 transceivers suitable for industrial noise levels • Wide-temperature components and protection for surge, reverse polarity and ESD • On-board power path management for dual supply (mains & battery) with status monitoring pins Deliverables 1. Complete schematic files, PCB gerbers, pick-and-place and 3D step files 2. Well-annotated BOM with manufacturer part numbers and second sources where practical 3. Brief hardware bring-up guide describing test points and firmware loader access Acceptance criteria • Board boots the STM32 and registers the EC200 on an LTE network via eSIM in the lab • RS-232/485 ports pass loop-back and 1 kV surge tests without data loss • Switchover to battery occurs with <50 ms interruption at 500 mA load If you have shipped similar industrial designs, especially with STM32 and Quectel radios, I’d like to see a quick portfolio snippet alongside your proposed timeline and preferred CAD tool.
Skills required
This job is listed on Freelancer.com. AiZity aggregates listings for discovery only and is not the employer. To bid or apply, use the button in the sidebar.